Header Gasket LS Engines

The Header Gasket LS Engines from ALLSTAR PERFORMANCE is a precision-engineered exhaust seal designed for GM LS-series engine platforms. If you're building a high-performance LS engine or refreshing an existing stroker, this gasket prevents exhaust leaks at the header-to-cylinder head interface—a critical junction that experiences extreme heat and pressure cycles. Proper sealing here ensures maximum scavenging efficiency and prevents power loss from bypass leakage.

Constructed with a steel core laminate design, the Header Gasket LS Engines features a 1.860-inch round port geometry matched to stock and popular aftermarket header castings. The laminate construction delivers superior crush strength and thermal stability, resisting gasket blowout under peak combustion pressures while maintaining a reliable seal across repeated heat cycles. Steel core reinforcement prevents the gasket from creeping under sustained exhaust temperatures, a common failure mode in budget alternatives. Each gasket is manufactured to tight tolerances, ensuring proper seating without over-compression that can damage cylinder head sealing surfaces.

This gasket suits LS engine builders at all levels—from street performance enthusiasts to dedicated race shops. Installation is straightforward: clean the header and head surfaces to bare metal, position the gasket, and torque the header bolts to factory specifications in a star pattern. Whether you're running a naturally aspirated LS1, turbocharged LS9, or supercharged LSA platform, the Header Gasket LS Engines provides consistent, lasting performance. It's an economical way to eliminate exhaust manifold leaks that rob power and create unwanted noise at the headers.